title: Opinion: the validity of animal studies with chemical carcinogens.
mesh_terms: D000818:Animals; D002273:Carcinogens; D006801:Humans; D051379:Mice; D009369:Neoplasms / Q000139:chemically induced*; D011817:Rabbits; D051381:Rats; D012439:Saccharin; D001749:Urinary Bladder Neoplasms / Q000139:chemically induced
chemical_list: D002273:Carcinogens; D012439:Saccharin